0,3
Cf. A012855.
Sequence in context: A153476 A107290 A122393 this_sequence A149073 A167011 A059714
Adjacent sequences: A012877 A012878 A012879 this_sequence A012881 A012882 A012883
nonn
N. J. A. Sloane (njas(AT)research.att.com).
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